engineering recuitment DRDO CEPTAM STA B Tier I (Sr. Technical Assistant) Mock Test 2022 Quantitative Aptitude Time and Work Work Efficiency
Ram, Shyam and Madhu can do a work alone in 24 days, 30 days and 40 days, respectively. They started working simultaneously, but Madhu left midway and it took 4 more days to finish the work. How many days did all three work together?
1
7
2
6
3
11
4
10